Though the list is called the 'greatest detroit songs ever', the guidelines were expanded to include all Michigan artists :

We simply asked some Detroit music experts for their lists; some got back to us, some didn't. The guidelines were expanded to include southeastern Michigan so that Flint, Grand Rapids, Saginaw, etc., were included.

Yeah I kind of thought so just curious. I thought you may have some automated system or something. And absolutely these lists are so good I wouldn't mind at all either. When you're passionate about something in this case music it shouldn't bother you at all.